#include"bmpio.h"

static BmpIO g_bmpio;

// 画像ファイルを読み込む
void LoadImageFile(HWND hWnd,TCHAR *path)
{
	g_bmpio.LoadImage(hWnd,BIT24,path);
	const TCHAR *error=g_bmpio.GetLastErr();
	if(error) MessageBox(hWnd,error,NULL,MB_OK);
}

// 画像をファイルに保存
void SaveImageFile(HWND hWnd)
{
	g_bmpio.SaveBmp(hWnd,false,BIT24);
	const TCHAR *error=g_bmpio.GetLastErr();
	if(error) MessageBox(hWnd,error,NULL,MB_OK);
}

// コピー
void ClipCopy(HWND hWnd)
{
	g_bmpio.ClipCopy(hWnd);
	const TCHAR *error=g_bmpio.GetLastErr();
	if(error) MessageBox(hWnd,error,NULL,MB_OK);
}

// 貼り付け
void ClipPaste(HWND hWnd)
{
	g_bmpio.ClipPaste(hWnd,BIT24);
	const TCHAR *error=g_bmpio.GetLastErr();
	if(error) MessageBox(hWnd,error,NULL,MB_OK);
}

// 空のBMPを作成する
void CreateEmpty(HWND hWnd)
{
	g_bmpio.CreateEmpty(320,240,BIT24);
	const TCHAR *error=g_bmpio.GetLastErr();
	if(error) MessageBox(hWnd,error,NULL,MB_OK);
}

LRESULT CALLBACK WindowProc(HWND hWnd,UINT msg,WPARAM wParam,LPARAM lParam)
{
	HDC hdc;
	PAINTSTRUCT ps;

	DWORD width,height;
	HDC hdc_mem;

	HDROP hDrop;
	TCHAR pFullPath[MAX_PATH];

	switch(msg)
	{
	case WM_CREATE:
		DragAcceptFiles(hWnd,TRUE);		// ドラッグアンドドロップを受け入れる
		return 0;
	case WM_DROPFILES:		// ドラッグアンドドロップ
		hDrop=(HDROP)wParam;
		DragQueryFile(hDrop,0,pFullPath,sizeof(pFullPath)/sizeof(TCHAR));
		DragFinish(hDrop);
		LoadImageFile(hWnd,pFullPath);
		InvalidateRect(hWnd,NULL,TRUE);
		return 0;
	case WM_PAINT:
		hdc=BeginPaint(hWnd,&ps);

		width=g_bmpio.GetWidth();
		height=g_bmpio.GetHeight();
		hdc_mem=g_bmpio.GetHDC();

		BitBlt(hdc,0,0,width,height,hdc_mem,0,0,SRCCOPY);

		EndPaint(hWnd,&ps);
		return 0;
	case WM_KEYDOWN:
		switch(wParam)
		{
		case VK_F1: LoadImageFile(hWnd,NULL); break;
		case VK_F2: SaveImageFile(hWnd); break;
		case VK_F3: ClipCopy(hWnd); break;
		case VK_F4: ClipPaste(hWnd); break;
		case VK_F5: CreateEmpty(hWnd); break;
		}
		InvalidateRect(hWnd,NULL,TRUE);
		return 0;
	case WM_DESTROY:
		PostQuitMessage(0);
		return 0;
	}
    return DefWindowProc(hWnd,msg,wParam,lParam);
}

int WINAPI WinMain(HINSTANCE hInst,HINSTANCE hPrevInst,PSTR lpCmdLine,int nCmdShow)
{
	WNDCLASS wc;
	MSG msg;

	wc.style		 = CS_HREDRAW | CS_VREDRAW;
	wc.lpfnWndProc	 = WindowProc;
	wc.cbClsExtra	 = 0;
	wc.cbWndExtra	 = 0;
	wc.hInstance	 = hInst;
	wc.hIcon		 = LoadIcon(NULL,IDI_APPLICATION);
	wc.hCursor		 = LoadCursor(NULL,IDC_ARROW);
	wc.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
	wc.lpszMenuName	 = NULL;
	wc.lpszClassName = _T(__FILE__);
	if(!RegisterClass(&wc)) return 0;		// error

	HWND hWnd=CreateWindow(
		_T(__FILE__),_T("test of BmpIO"),
		WS_OVERLAPPEDWINDOW | WS_CLIPCHILDREN | WS_VISIBLE,
		CW_USEDEFAULT,CW_USEDEFAULT,
		CW_USEDEFAULT,CW_USEDEFAULT, 
		NULL,NULL,hInst,NULL);
	if(hWnd==NULL) return 0;		// error

	BOOL bRet;
	while((bRet=GetMessage(&msg,NULL,0,0))!=0)
	{
		if(bRet==-1) break;
		DispatchMessage(&msg);
	}

	return (int)msg.wParam;
}